package com.situ.mall.javase;

import org.junit.jupiter.api.Test;

public class TTT {

    @Test
    public void test1() {
        byte a = 127;
        byte b = 127;
        //b = a + b;
        b += a;
        System.out.println(b);

        short s1 = 1;
        //s1 = s1 + 1;
        s1 += 1;
    }
}
